import java.util.List;
import java.util.Locale;
import java.util.Scanner;

public class Test {




    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        String ss = s.toLowerCase();
        System.out.println(ss);
    }

    public boolean isPalindrome(String s) {
        s = s.toLowerCase();
        int left = 0;
        int right = s.length()-1;
        while(left<right) {
            while(left<right && !isNumberAndCharacter(s.charAt(left))){
                left++;
            }
            while(left<right && !isNumberAndCharacter(s.charAt(right))){
                right--;
            }
            if(s.charAt(left) == s.charAt(right)){
                left++;
                right--;
            }else{
                return false;
            }
        }
        return true;
    }

    public boolean isNumberAndCharacter(char ch) {
        if(Character.isDigit(ch) || Character.isLetter(ch)) {
            return true;
        }
        return false;
    }

    public static void main1(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();

        //1.
//        String[] ss = s.split(" ");
//        int len = ss[ss.length-1].length();
//        System.out.println(len);

        //2.
        int index = s.lastIndexOf(" ");
        String ss = s.substring(index+1);
        System.out.println(ss);
        System.out.println(ss.length());
    }
}
